WO2013143138A1

WO2013143138A1 - Liquid crystal display device manufacturing method and liquid crystal display device

Info

Publication number: WO2013143138A1
Application number: PCT/CN2012/073384
Authority: WO
Inventors: 张彦学
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2012-03-29
Filing date: 2012-03-31
Publication date: 2013-10-03
Also published as: CN102608795A; DE112012005947B4; CN102608795B; DE112012005947T5

Abstract

A liquid crystal display device manufacturing method and a liquid crystal display device. The liquid crystal display device manufacturing method comprises a method for manufacturing a front frame (100) and a rubber frame (200), which comprises: designing a plate-shaped front frame pattern and a rubber frame pattern in the same mold; injection molding in the mold and demolding to form the front frame (100) and the rubber frame (200). Since the freedom degree in the planar direction of a liquid crystal display panel (400) is fixed by the rubber frame while in the direction perpendicular to the liquid crystal display panel (400) is fixedly clamped by the front frame (100) and the rubber frame (200), and the front frame (100) is in a plate shape, in this way the front frame (100) can only position the liquid crystal display panel (400) in a direction (Z-axis direction) perpendicular to the liquid crystal display panel (400) and positioning in other directions are realized by the rubber frame (200), and therefore the structure of the front frame (100) is greatly simplified while mold opening cost of the front frame (100) is reduced. Furthermore, the front frame (100) and the rubber frame (200) can be formed by the same mold so that mold cost is lower, and the front frame (100) and the rubber frame (200) can be formed simultaneously by means of one injection molding process, so that production efficiency can be improved while production cost is reduced.

Description

Method for manufacturing liquid crystal display device and liquid crystal display device

[Technical Field]

The present invention relates to the field of liquid crystal display, and more particularly to a method of fabricating a liquid crystal display device and a liquid crystal display device.

【Background technique】

The liquid crystal display device comprises a front frame and a back plate, wherein the front frame is on the outermost layer of the liquid crystal display device, and the back plate is located on the back of the device, and is used for supporting the device inside the backlight module of the liquid crystal display device, and is matched with the front frame. The outer casing of the liquid crystal display device is formed. The inside of the liquid crystal display device is generally provided with a plastic frame for isolating the backlight module and the liquid crystal panel. Current mass-produced liquid crystal display devices usually use front frame fixing panels

( panel ), more than one-piece design (Figure 1-2) or bracket type (Figure 3-4) design, both of which require separate mold development.

As shown in FIG. 5-6, a liquid crystal display device includes a metal front frame 10, and a flexible spacer 13 is disposed between the metal front frame and the liquid crystal panel 40. The liquid crystal panel 40 and the light guide plate 50 are disposed between the liquid crystal panel 40 and the light guide plate 50. The plastic frame 20 is provided with a flexible gasket 13 on the contact surface of the plastic frame 20 with the liquid crystal panel 40. The metal front frame 10, the plastic frame 20 and the back plate 30 are fixed on the side surface of the liquid crystal display device.

There are at least two problems in the above conventional liquid crystal display device: 1. The cost of the mold in the front frame is high; 2. The material cost and labor cost are high.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a method for fabricating a low-cost liquid crystal display device and a liquid crystal display device.

The object of the present invention is achieved by the following technical solutions:

A manufacturing method of a liquid crystal display device, comprising a method for manufacturing a front frame and a plastic frame:

A: Design a plate-shaped front frame graphic and plastic frame graphic in the same mold;

B: Injection molding in the mold, the front frame and the plastic frame are formed after demolding. Preferably, the front frame graphic comprises four independent sub-front frame graphics, and a mosaic structure graphic of a rectangular front frame formed by connecting the four sub-front frames. By adopting the method of sub-front frame splicing, the front frame structure can be tubularized, and the single front frame can be taken out separately when the mold is taken out, which reduces the difficulty of the ejection.

Preferably, the frame of the plastic frame is an integrally formed graphic structure. The integrally formed plastic frame pattern can be used to complete the installation steps of the subsequent front frame, and the front frame connection strength is also relatively high.

A liquid crystal display device includes a front frame and a plastic frame, and a liquid crystal panel is sandwiched between the front frame and the plastic frame, and the liquid crystal panel is fixed by a plastic frame in a direction parallel to the light exiting surface thereof, and a vertical direction of the light emitting surface thereof The front frame and the plastic frame are clamped and fixed, and the front frame is plate-shaped.

Preferably, the front frame includes four independent sub-front frames, and the four sub-front frames are connected end to end to form a rectangular front frame. The front frame splicing method can be used to reinforce the front frame structure, and the single front frame can be taken out separately when the mold is taken out, which reduces the difficulty of the mold.

Preferably, the plastic frame is an integrally formed structure. The one-piece structure can be used to complete the installation steps of the subsequent front frame, and the front frame connection strength is also relatively high.

Preferably, the edge of the front frame is located inside the top of the plastic frame, and the top of the plastic frame is flush with the outer surface of the front frame, which can improve the flatness of the surface of the liquid crystal display device.

Preferably, the front frame and the plastic frame are made of the same material. Using the same material facilitates common mode production, saving mold costs and increasing production efficiency.

Preferably, the liquid crystal display device includes a backing plate, the backing plate is provided with a hemming surface in a direction of the front frame, and the folded surface of the front frame, the plastic frame and the back plate is fixed by screws; The surface is provided with a sinking surface at a position where the screw is fixed. One of the fixed structures of the back panel, the plastic frame and the front frame is superimposed. The fixing of the back panel, the plastic frame and the front frame can be achieved simultaneously with one screw, and the installation efficiency is high. When the screw is fixed, its head will be higher than its fixed surface. After the sinking surface is set, the surface of the screw head is almost flush with the outer surface of the entire front frame to improve the flatness.

Preferably, the front frame is provided with an inner surface facing the inner surface of the liquid crystal panel. The inner surface can avoid the circuit at the edge of the liquid crystal panel, avoiding the short circuit caused by the contact of the conductive film with the circuit.

According to the invention, the degree of freedom of the liquid crystal panel in the plane direction is fixed by the plastic frame and the direction of the vertical liquid crystal panel The front frame and the plastic frame are clamped and fixed, and the front frame is plate-shaped, so that the front frame only positions the liquid crystal panel in a direction perpendicular to the liquid crystal panel (Z-axis direction), and the positioning in other directions is realized by the plastic frame. This greatly enlarges the structure of the front frame and reduces the cost of opening the front frame. Further, the front frame and the plastic frame can be co-molded by the same mold, so that the mold cost is lower, and one injection can be simultaneously produced. The frame and the plastic frame are beneficial to the improvement of production efficiency and the reduction of production cost.

[Description of the Drawings]

Figure 1 is a schematic view of the assembly of the existing integrated front frame;

2 is a front structural view of a conventional integrated front frame;

Figure 3 is a schematic view showing the assembly of the conventional bracket type front frame;

Figure 4 is a schematic view of a conventional bracket type front frame;

5 is a schematic view of a conventional liquid crystal display device;

Figure 6 is a partial cross-sectional view of Figure 5;

Figure 7 is a schematic view of the common frame of the plastic frame and the front frame;

Figure 8 is a schematic view of the structure of the present invention;

Figure 9 is a partially enlarged schematic view of the present invention;

Figure 10 is a perspective view showing the structure of the present invention;

Figure 11 is a plan view showing the structure of the present invention;

Wherein: 100, front frame; 110, inner surface; 120, conductive film; 130, sinking surface; 140, sub front frame; 200, plastic frame; 220, opening; 300, back plate; 310, card hook; 320, folding surface; 400, liquid crystal panel; 500, light guide; 600, screws.

【detailed description】

The invention will now be further described with reference to the drawings and preferred embodiments.

A manufacturing method of a liquid crystal display device includes a front frame 100 and a plastic frame 200:

A: a pattern of the plate-shaped front frame 100 and the plastic frame 200 is designed in the same mold; B: Injection molding is performed in the mold, and the front frame 100 and the plastic frame 200 are formed after demolding.

As shown in FIG. 7, the front frame graphic includes four independent sub-front frame graphics, and a splicing structure graphic of a rectangular front frame formed by connecting the four sub-front frames. The splicing of the front frame can be used to reinforce the structure of the front frame. When the dies are removed, the single front frame can be taken out separately, which reduces the difficulty of the dies. The plastic frame pattern is a one-piece graphic structure, and the integrally formed structure can complete the installation steps of the subsequent front frame, and the front frame connection strength is also relatively high. Of course, the plastic frame can also be segmented, and the structure is spliced by a plurality of sub-rubber frames to facilitate the ejection of the structure.

In the existing liquid crystal display device, since the front frame 100 is complicated, the front frame 100 and the middle frame need three sets of molds to be processed, and the present invention adopts a cylindrical front frame 100 design, which can be simultaneously in a set of molds. Box and front box 100.

As shown in FIG. 7-11, a liquid crystal display device includes a front frame 100, a plastic frame 200, and a back plate 300. The liquid crystal panel 400 is sandwiched between the front frame 100 and the plastic frame 200. The degree of freedom of the liquid crystal panel 400 in the plane direction is fixed by the plastic frame 200, and the direction of the vertical liquid crystal panel 400 is fixed by the front frame 100 and the plastic frame 200. The front frame 100 is in the shape of a plate, and the edge of the front frame 100 is located in the plastic frame 200. On the inner side of the top portion, the inner side 4 of the top of the plastic frame 200 grips the side of the front frame 100, and the top thereof is flush with the outer surface of the front frame 100. The front frame includes four independent sub-front frames 140, and the four sub-front frames 140 are connected end to end to form a rectangular front frame. The front frame 140 can be used to splicing the front frame structure, and the single front frame 140 can be taken out when the mold is taken out, which reduces the difficulty of the die. The plastic frame adopts an integrally formed structure, and the integrally formed structure can complete the installation steps of the subsequent front frame, and the front frame connection strength is also relatively high. Of course, the plastic frame can also be segmented, and the structure is spliced by a plurality of sub-rubber frames to facilitate the ejection of the structure.

The front frame 100 has no hem, and is fixed to the top of the plastic frame 200 in a plate-like surface. The structure of the front frame 100 can be further reduced, and the cost is reduced. The top of the plastic frame 200 and the outer surface of the front frame 100 are flush. Improve the flatness of the surface of the liquid crystal display device. Of course, it is also possible that the front frame 100 is provided with a folded edge to wrap the top of the plastic frame 200 and is fixed to the plastic frame 200 on the side of the plastic frame 200.

The liquid crystal display device includes a back plate 300, and the back plate 300 supports a light guide plate 500, and the sidewall thereof is disposed There is a hook 310. Correspondingly, the side wall of the plastic frame 200 is provided with an opening 220 that cooperates with the hook 310. The hook 310 and the opening 220 cooperate to fix the back plate 300, and also facilitate the disassembly of the back plate 300. The backplane 300 is provided with a flanged surface 320, a front frame 100, a plastic frame 200, and a folded surface 320 of the backboard 300, such that the backplane 300, the plastic frame 200, and the front frame 100 have a fixed structure. The surfaces are superimposed, and the back plate 300, the plastic frame 200, and the front frame 100 can be fixed simultaneously by one screw 600, and the installation efficiency is high. Of course, it is also possible to fix by techniques such as bonding, welding, riveting, and the like.

Since the head of the screw 600 is raised above its fixing surface after the screw 600 is fixed, the sinking surface 130 can be provided on the outer surface of the front frame 100 at a position where the corresponding screw 600 is fixed. After the sinking surface 130 is set, the surface of the screw head 600 is substantially flush with the outer surface of the entire front frame 100 to improve the flatness.

The front frame 100 is further provided with a conductive film 120 on one side of the liquid crystal panel 400. The conductive film 120 is electrically connected to the back plate 300 through the bolts, and the static electricity generated on the surface of the liquid crystal panel 400 is introduced into the metal back plate 300 behind the device. The reliability of the liquid crystal panel 400. The front frame 100 is provided with an inner surface 110 facing the inner surface of the liquid crystal panel 400. The inner surface 110 can avoid the circuit at the edge of the liquid crystal panel 400, and avoid the short circuit caused by the contact of the conductive film 120 with the circuit.

In order to save the number of molds and reduce the cost of the mold, the front frame 100 and the frame 200 can be made of the same material.

The front frame 100 of the present invention only fixes the degree of freedom in the Z-axis direction of the liquid crystal panel 400 (panel), which can achieve the purpose of fixing the liquid crystal panel 400 (panel), and also greatly simplifies the design of the front frame 100. Based on the design, the front frame 100 and the plastic frame 200 can be injection molded by the same plastic material, which can achieve the purpose of fixing the liquid crystal panel 400 (panel), and can also be used for the front frame 100 and the plastic frame 200. The same set of molds are used for injection molding to achieve the purpose of designing the product and reducing the cost of the mold and product materials.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments. It is not intended that the specific embodiments of the invention are limited to the description. It will be apparent to those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the invention.

Claims

Rights request

1. A method of fabricating a liquid crystal display device, comprising: a method of manufacturing a front frame and a plastic frame:

A: designing a plate-shaped front frame graphic and a plastic frame graphic in the same mold; the front frame graphic includes four independent sub-front frame patterns, and a mosaic structure pattern of a rectangular front frame formed by connecting the four sub-front frames end to end; The plastic frame graphic is an integrally formed graphic structure;

B: Injection molding in the mold, the front frame and the plastic frame are formed after demolding.

2. A method for fabricating a liquid crystal display device, comprising: a method for manufacturing a front frame and a plastic frame:

3. The method of fabricating a liquid crystal display device according to claim 2, wherein the front frame pattern comprises four independent sub-front frame patterns, and a splicing structure pattern of a rectangular front frame formed by connecting the four sub-front frames end to end. .

4. A method of fabricating a liquid crystal display device according to claim 2, wherein the gel block diagram is formed as an integrally formed pattern structure.

A liquid crystal display device comprising a front frame and a plastic frame, wherein a liquid crystal panel is sandwiched between the front frame and the plastic frame, and the liquid crystal panel is fixed by a plastic frame in a direction parallel to the light emitting surface thereof, and a light emitting surface thereof The vertical direction is fixed by the front frame and the plastic frame, and the front frame is plate-shaped.

6. A liquid crystal display device according to claim 5, wherein the front frame comprises four independent sub front frames, and the four sub front frames are connected end to end to form a rectangular front frame.

7. A liquid crystal display device according to claim 5, wherein the plastic frame is an integrally formed structure.

8. A liquid crystal display device according to claim 5, wherein an edge of the front frame is located inside the top of the plastic frame, and a top of the plastic frame is flush with an outer surface of the front frame.

9. A liquid crystal display device according to claim 5, wherein the front frame and the plastic frame are of the same material.

The liquid crystal display device of claim 5, wherein the liquid crystal display device comprises a back plate, and the back plate is provided with a hemming surface in a direction of the front frame, the front frame, the plastic frame and the back plate The hemming surface is fixed by screws; the outer surface of the front frame is provided with a sinking surface at a position where the screw is fixed.

A liquid crystal display device according to claim 10, wherein the front frame is provided with an inner surface facing the inner surface of the liquid crystal panel.